The GNU-utils df command supports a flag `-l` which displays information about local disks only. The AIX df equivalent is `-T local`. However, my build systems uses GNU-utils on AIX. In this case, the build system erroneously uses `df -T local`, and incorrectly determines that the disk is non-local from the error text.
This change corrects that issue by testing if the enabled version of df returns cleanly with the `-T local` flag when AIX is the detected OS. If it does, `-T local` is used, and if not, it defaults to `-l`. ------------- Commit messages: - Add test logic for df -T local Changes: https://git.openjdk.org/jdk/pull/13065/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13065&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8304364 Stats: 5 lines in 1 file changed: 4 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/13065.diff Fetch: git fetch https://git.openjdk.org/jdk pull/13065/head:pull/13065 PR: https://git.openjdk.org/jdk/pull/13065
